Protests and rioting took place throughout the tournament, which the hosts went on to win, against the spending on stadiums ahead of next year's competition.

It is felt by some Brazilians that the money would be better off spent on healthcare and education, while an increase in the cost of public transport did little to temper their frustration.

The government is projecting that $13.3 billion will be spent on stadiums, airport renovations and other projects for the World Cup and 2016 Olympics, with an estimated $3.5 billion on venues.

"In the wake of the protests, Congress must change its attitude and open this investigation demanded by the people," Reuters reports senator Alvaro Dias as saying of the main opposition party PSDB, which initially requested the probe.

"No doubt there will be major revelations."

Reflecting on the events that took place at the Confederations Cup, FIFA president Sepp Blatter told German press agency DPA: "If this happens again we have to question whether we made the wrong decision awarding the hosting rights.

"We didn't do a political debriefing, but we did emphasize the fact of this social unrest being there for the entire duration of the Confederations Cup. The government is now aware that next year the World Cup shouldn't be disturbed.

"To me, these protests were like alarm bells for the government, the senate, the parliament. They should work on it so that this is not going to happen again. Though protests, if peaceful, are part of democracy and therefore have to be accepted ... we are convinced the government, and especially the president, will find the words and the actions to prevent a repeat. They have a year to do so."